Synonyms|577Antonyms|125|Broader|8Narrower|14Related|988
1
elaborate
1
endless
1
enthralled(adjective, caring, thoughtful, considerate, responsive)
1
eternal
1
exhaustive
1
fascinated(adjective, caring, thoughtful, considerate, responsive)
1
fastidious(adjective, careful, thoughtful, sober, cautious)
1
fiend for(expression, adjective, absorbed, occupied, engaged)
1
finicking
1
fireball(smart, skillful, industrious, ambitious, nimble-witted)
1
fixed
1
fraught
1
from A to Z(expression, idiom, complete, tough, full)
1
full-dress(complete, tough, full, conscientious, exhaustive)
1
giggle
1
gone(adjective, involved, absorbed, occupied, engaged)
1
grind
1
gripped(adjective, involved, absorbed, occupied, engaged)
1
having a full plate(expression, idiom, active, occupied, working)
1
having fish to fry(expression, idiom, active, occupied, working)
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ChicagoSmart Define. 2015. "assiduous thesaurus" https://smartdefine.org/assiduous/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, assiduous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/assiduous/thesaurus/synonyms>.
MLASmart Define. "assiduous thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/assiduous/thesaurus/synonyms>